Dusting device



Sept 25, 195l H. E. BRANDT 2,569,369A

DUSTING DEVICE Filed March 29, 1945 2 Sheets-Sheet 1 Invefltcl" HENRY E. BRANDT Sept. 25, 1951 H. E. BRANDT 2,569,369

DUSTING DEVICE Filed March 29, 1945 2 Sheets-Sheet 2 InventOr-z HENRY EBRA Nm Patented Sept. 25, 1951 UNITED STATES PATENT OFFICE DUSTING DEVICE Henry E. Brandt, North st. Paul, Minn.

Application March 29, 1945, Serial No. 585,456

(Cl. l13u-14:7)

9 Claims.

This invention relates to a dusting device such as is used to spray insecticide powders or dust onto plants or other objects. While the invention may have various applications, it is illustrated as embodied in a dusting device adapted to be carried by the operator and having a conduit adapted to be connected to a source of air under pressure.

It is an object of this invention to provide a dusting device constructed and arranged to be easily carried and manipulated and to effectively distribute the dust onto the desired objects.

It is another object of the invention to provide a dusting device comprising a casing forming a dust receiving chamber, a discharge conduit leading from said chamber, an air supply conduit communicating` with said chamber and projecting at one end of said casing and adapted to be connected to a source of air under pressure, a check valve in said air supply conduit and conveniently located and easily operated means for opening said check valve to admit air into said chamber.

It is also an object of the invention to provide a dusting device as set forth in the preceding paragraph, said air supply conduit having a Valve therein within said chamber adapted to be opened by the passage of air through said air supply conduit and to close upon the cessation of said air supply to prevent dust from passing into said check valve.

It is still another object of the invention to provide a dusting device comprising a casing preferably of cylindrical form, the same having a dust receiving chamber therein, a discharge conduit projecting at the front end of said casing, an air supply conduit projecting at the other end of said casing, a handle for carrying said device secured to the latter end of said casing, said air supply conduit having a check valve therein and a plunger for controlling said check valve, said air supply conduit and plunger being supported by said handle.

It is more specifically an object of the invention to provide a dusting device such as set forth in the preceding paragraph including a valve casing for said check valve secured to said handle.

It is still another object of the invention to provide a dusting device comprising a casing forming a dust receiving chamber, a discharge conduit at one side of said casing and having a discharge end at the front of said casing, said conduit communicating through a plurality of small openings with said chamber, an air supply conduit extending into the front end of said chamber and having an end within said chamber disposed somewhat adjacent the front end of said chamber, said casing having a filling opening at its front end, a cap for closing said opening and a screen carried by said cap and adapted to be disposed between said discharge end of said air supply conduit and said discharge conduit.

` k'lhese and other objects and advantages.' of the inventionfwill be fully set forth in the following description made in connection with the accom- `panying drawings in which like reference characters refer to similar parts throughout the several views and in which:

Fig. 1 is a View in side elevation of said dusting device;

Fig. 2 is a partial central vertical section through said device;

Fig. 3 is a perspective view of a valve used;

Fig. 4 is a vertical section taken substantially on line 4 4 of Fig. 2, as indicated by the arrows;

Fig, 5 is a vertical section taken substantially on line 5-5 of Fig. 2, as indicated by the arrows;

Fig. 6 is a horizontal section taken on line 6 6 of Fig. l, as indicated by the arrows;

Fig. 7 is a section taken substantially on line 'I-l of Fig. l, as indicated by the arrows; and

Fig. 3 is a perspective view of the discharge end of an air supply conduit.

Referring to the drawings, a dusting device is shown comprising a casing I0. While this casing could be of various forms, in the embodiment of the invention illustrated it is shown as cylindrical and somewhat elongated. The casing Il) has a chamber therein or forms a chamber adapted to receive the dust to be sprayed. A discharge conduit Il is secured along one side of casing I0 and projects forwardly a short distance at the front end of said casing, which conduit may be provided with a spray nozzle I2, the same being illustrated as having a semi-spherical end with a multiplicity of small holes or perforations IZa therein. As shown in Fig. 4, the top of casing I@ is attened for a short transverse portion thereof where conduit II is connected thereto and said conduit is provided with outwardly extending flanges IIa secured to said flattened portion in any suitable manner as by soldering or welding. The wall of casing Ill beneath conduit Il, and preferably centrally thereof, is provided with a multiplicity of small holes or perforations Ita. Casing IU has a front end Ib flanged to extend over the end of said casing and be connected thereto by soldering or welding. End ISE; tapers inwardly and forwardly somewhat and has a threaded cylindrical end portion IQ@ open at its outer end to provide a filling opening foil casing IIJ. Said opening is closed by a cap I3 having a threaded ange adapted to be screwed upon the threaded portion Ille, said cap preferably having a gasket I4 adapted to engage the inturned end of portion I 0e to provide a tight closure. Cap I3 is provided with a suitable handle i3d for turning the sameV and in the embodiment of the invention illustrated this is shown as a small rod or wire extending across the outer end of said cap and secured thereto by soldering or welding,

plate I6, the same preferably being of concavo- Y convex form in transverse cross section, the same azscaee 3 being disposed between discharge conduit II and an air supply conduit to be later described, said screen having its concave side directed toward said air supply conduit. The sides of said plate I6 are tapered toward its inner end. Said cap and plate thus form a scoop.

An air supply conduit I1 extends into the chamber IE! through the rear end. If'lld,v thereof.V which rear end has a flange at its periphery extending over and secured to the end f' casing IU. Said air supply conduit extends along the inner wall of casing It and has a attened discharge end Ila. having a discharge opening therethrough. The inner end of conduit IT issupported by and secured to casing Il? by a small block Ilhwof solder or other material. 'herdischarge end of conduit Il is clearly shown in Fig. 8. Within the charn-Y ber of casing IQ and adjacent therear end IDd conduit I7 is secured to a valve casing I8 within which is disposed a valve I9. Valve I9 is of the check valve type and is illustrated as made of a resilient sheet such as rubber having aflattened end IBa substantially rectangular in cross section, said end having a discharge slit |913 extend- .ing thereacross for the majorportion of its width. The rear end lac of valve I9 iscylindrical and ts against the wall of casing I8, the lsame hav- .ing an inwardly extending flange I-.Qd withV a -central opening therethrough. Conduit Il extends from the rear end of valve I9 through endv wall Id and into a valve casing 2 I. Valve casing 2l is provided with a valve seat 2 Ia adapted to .be engaged by a ball valve 22 having a short plunger at one side slightly reduced in diameter .at its rear end and extending into the end of .a compression coiled spring 23, the other end of which seats against an inwardly extending flange Ilb in the rear end of conduitvl'l. Spring 23 tends to hold ball 242 against seat 21a and thus to hold the valve in closed posi-tion. The rear portion of conduit I'l has an endthreaded into valve casing 2l and has anenlarged portion I'Ic' engaging the end of valvecasi-ng 2l.` Conduit-I1 extends rearward-ly having another enlarged portion I'ld extending into onev portionv of a handle 2@ and said conduit has an end portion lle provided with an intermediate Vhexagonal partv I-'If and a terminal tapered portion Hg over which a ilexible or resilient tube 25 may be 'disposed to connect conduit Il to a suitable source of. air under pressure. A plate 27 of tra-pezoidal shape in plan, as shown inv Fig. 6, has "a vertically extending end or iiange 27a at its front end recessedVv to receive theY casing I just forwardly 'of the rear end Id, said iange 21a being secured td casing I!) lby soldering or welding. Plate-2 tapers toward its rear end and has inturned portions:

or flanges 2lb at each side. A handle: 2li has a lower portion 25a which extendsV downwardly and forwardly, the same being shown as 'somewhat curved and having a short forwardlyr projecting flange Zeb overlying the front end of plate'` 21. and having its outer portions disposed beneath the flanges 2lb. The' enlarged portion` Hd rof conduit I'I extends` through an aperture in portion 24a. Handle 2'4has a grip p'orti'on 24C' of elliptical or cylindrical shape in cross section' and Which is formed by bending the sides of said handle downwardly and inwardly. HandleA 24 also has a portion 24d extending. fromv the upper end of portion 24e downwardly and' forwardly. to the top of casing II'I to Which top it is secured by soldering or welding. Portionl 24(1"extends some distance circumferentialflyfof casing miras" -shown in Fig.

A plunger 29 has a reduced lower end extending into and fitting into a bore in the top of valve casing 2|. Said bore is so located that when plunger 29 is depressed it will engage the front end of ball 22 and cam or push the same rearwardly against the pressure of spring 23 thus opening the valve. Plunger 29 extends upwardly andA slightly forwardly and through an aperture in portion 24d of handle 24. A sleeve 30 is secured to plunger 29 in any suitable manner as by a pin 3I,..the upper end of sleeve 3i) engaging the underside of portion 25d. to limit the upward movement of plunger 29. Plunger 29 is provided with ahead 29a shown as of inverted cup form,V

and a compression coiled spring engages the underside ci head the lower end ci said spring engaging the top of portion 2551i. Spring 32Vthus acts to hold plunger 29 in elevated position.

In operation the dust to be sprayed will be placed in the chamber in casing` lil by removing cap i3. When cap I3 is replaced to close the filling opening, the screen I comes into the position shown in Fig. 2. The tube 2e, as stated, will be connected to a suitable source of air under pressure. The operator grasps the portion 24e of handle 2li Withhisy hand and he can then easily operate plunger 29 with his thumb or forefinger. When plunger 29 is depressed, ball 22 is forced from its seat and air passes through conduit Il into the chamber in casing it. The air passes through valve It and expands portion Illa thus opening the slit ISD to permit the passage of air. The air is directed by the end Ila of conduit it forwardly and somewhat downwardly at the front end of casing i8 and the air beingv deflected by the wall o casing Iii and the end thereof creates a whirl and stirs up and lifts the dust in the cham-ber of casing Ill'. The air passes out through the holes Ita and through discharge conduit Il carrying the dust with it. The dust is thus discharged in a spray through the conduit H or through the nozzle I2 when the latter is used. The vdust alsol passes through screen IE and thisl screen protects the openings- Ia andV insures thatY the dust will be in finek condition before passing to said openings. When theY operator releases plunger 29 it is moved to its upper position and spring 23 moves ball 22 against its `seat thus shutting. oi the supply 'or air. Valve I9 immediately contracts and this prevents any substantial amount of powder passing rearv-.lardly of said valve. The powder is thus prevented from passing to valve casing 2l. The scoop formed by plateA t6 and cap I3 can be used to place the inaterial in container I0..

From the above description it will loeseen that I havezprovided a simple and very enicient dusting device. The' saine is easily carried and manipulated andthe plants'or other objects can be quickly and:v efficiently sprayed. 'Theope'rator can hold thel device one hand and' with his other hand turn up the leaves or the plants if desired so that the undersideslot the leaves can be sprayed. The whole plant canthu's-be effectively covered. Thel parts are designed for efficient production andv are conveniently'arranged. Handle 2li ismade changes may be made in the form, details, arrangement and proportions of the parts, without departing from the scope of applicants invention, which generally stated, consists ina device capable of carrying out the objects above set forth, in the parts and combinations of parts disclosed and defined in the appended claims.

What is claimed is:

1. A dusting device having in combination, a container forming a dust receiving chamber and casing, a discharge conduit projecting at the front end of said chamber and communicating with said chamber, an air supply conduit extending into said casing and communicating with said chamber, the same projecting at the rear end of said casing and being adapted to be connected to a source of air under pressure, a handle having one end secured to one side of said container at said rear end, said handle having a portion extending upwardly and rearwardly, said handle having a grip portion extending downwardly and rearwardly from said ilrst mentioned portion, having a third portion extending from said grip portion downwardly and having a fourth portion extending forwardly substantially parallel to a side of said casing and connected to said casing at a point substantially opposite said rst mentioned portion.

2. The structure set forth in claim 1, said air supply conduit having a valve casing therein secured to said last mentioned portion of said handle, said valve casing having a check valve therein, a plunger extending upwardly from said valve casing through the rst mentioned portion of said handle adapted to lbe depressed for opening said check valve and resilient means for holding said plunger in elevated position.

3. A dusting device having in combination, a casing forming a dust receiving chamber, a discharge conduit extending from the front end of said casing longitudinally thereof, anair supply conduit extending longitudinally of and at the rear end of said casing, a plate secured to the rear end of said casing adjacent the bottom side thereof and extending longitudinally of said casingand rearwardly in tapered form quite a distance beyond said rear end, and a handle having a front portion secured to said casing, an intermediate grip portion, and a lower portion secured to the rear end of said plate.

4. The structure set forth in claim 3, said grip portion extending downwardly and rearwardly from its front end.

5. The structure set forth in claim 3, said air supply conduit extending through said lower portion of said handle.

6. The structure set forth in claim 3, a check valve casing secured to said plate, a check valve in said casing, and a plunger for operating said valve extending from said valve casing upwardly through said front portion of said handle and substantially transversely of said casing.

7. A dusting device having in combination, a casing forming a dust-receiving chamber, a discharge conduit communicating with said chamloer, an air supply conduit communicating with said chamber, the same extending outwardly at one end of said casing, said air supply conduit being adapted to be connected to a source of air under pressure, a check valve in said air supply conduit, means adapted to be manipulated by the operator for controlling said valve, and a handle at said end of said casing adapted to be grasped for carrying said device and having portions spaced from said container, said air supply conduit passing through and being supported in one of said portions and said last mentioned means comprising a plunger passing through and being supported in another of said portions.

8. A dusting device having in combination, a container having a dust-receiving chamber, a discharge conduit at one end of said container and communicating with said chamber, an air supply conduit communicating with said chamber, the same projecting at one end of said container, said air supply conduit being adapted to be connected to a source of air under pressure, a check valve in said air supply conduit and means adapted to be moved by the operator for lopening said valve, means for holding said last mentioned means in inoperative position, said check valve comprising a valve seat, a ball adapted to engage said seat, and resilient means acting to hold said ball against said seat to close said valve, said rst mentioned means comprising a plunger being positioned so that when it is depressed its end moves against said ball and moves the same against the pressure of said resilient means to open said valve.

9. A dusting device having in combination, a casing having a dust receiving chamber, said casing having a tight tting cap for closing one end thereof, a discharge conduit parallel to one side of said casing, an air supply conduit extending into said casing parallel to the opposite side thereof, the same projecting outwardly through the top of said casing, said air supply conduit being adapted to be connected to a source of `air under pressure, a check valve in said air supply conduit at the portion outside of said casing, and means adapted to be moved by the operator for opening said valve, means for holding said last mentioned means in inoperative position and a handle having one end secured to one side of said casing at the rear thereof, said handle having a portion extending generally upwardly and rearwardly, and having a third portion extending forwardly substantially parallel to a side of said casing and connected to said casing at a point substantially opposite said first mentioned point of connection, said air supply conduit extending through and secured to said last mentioned portion of said handle, and means for operating said valve in said conduit extending through and operative through said rst mentioned portion of said handle.

HENRY E. BRANDT.

REFERENCES CITED The following references are of 'record in the le of this patent:

'UNITED STATES PATENTS Number Name Date 1,021,015 Tarrant Mar. 26, 1912 1,715,986 Brown .June 4, 1929 1,877,778 Tappan Sept. 20, 1932 2,061,379 Hudson Nov. 17, 1936 2,068,871 Rose Jan. 26, 1937 2,086,696 Brandt July 13, 1937 2,137,526 Collins Nov. 22, 1938 .2,187,376 Guibert Jan. 16, 1940 2,341,036 Guibert Feb. 8, 1944 FOREIGN PATENTS Number Country Date 13,620 Australia July 31, 1934 208,909 Great Britain Jan. 3, 1924 

